//
//  VisitorView.swift
//  weibo
//
//  Created by apple on 16/4/7.
//  Copyright © 2016年 wangjianwei. All rights reserved.
//

import UIKit

/// 访客视图 - 处理用户未登录的界面显示
class VisitorView: UIView {
    
    // MARK: - 设置视图信息
    // 设置视图信息
    func setupInfo(imageName: String?, title: String) {
        messageLabel.text = title
        
        // 如果图片名称为nil, 说明是首页, 直接返回
        guard let imgName = imageName else {
            startAnim()
            return
        }
        iconView.image = UIImage(named: imgName)
        // 隐藏小房子
        homeIconView.hidden = true
        // 将遮罩图像移动到底层
        sendSubviewToBack(maskIconView)
    }
    
    /// 首页旋转动画
    private func startAnim() {
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 20
        
        anim.removedOnCompletion = false
        
        iconView.layer.addAnimation(anim, forKey: nil)
    }
    
     // MARK: - 构造函数
     override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        
        setupUI()
    }

    // MARK: - 懒加载控件
    // 图标
    private lazy var iconView: UIImageView = UIImageView(imageName: "visitordiscover_feed_image_smallicon")
    
    // 遮罩
    private lazy var maskIconView: UIImageView = UIImageView(imageName: "visitordiscover_feed_mask_smallicon")
    
    // 小房子
    private lazy var homeIconView: UIImageView = UIImageView(imageName:
        "visitordiscover_feed_image_house")
    
    // 消息
    private lazy var messageLabel: UILabel = UILabel(title: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜")
    
    
    // 注册按钮
    lazy var registerButton: UIButton = UIButton(title: "注册", color: UIColor.orangeColor(), imageName: "common_button_white_disable")
        
    // 登录按钮
    lazy var loginButton: UIButton = UIButton(title: "登录", color: UIColor.darkGrayColor(), imageName: "common_button_white_disable")
        
}

extension VisitorView {
    
    private func setupUI() {
        // 1. 添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(homeIconView)
        addSubview(messageLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        // 2. 设置自动布局
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        // 图标
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1.0, constant: -60))
        
        // 房子
        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1.0, constant: 0))
        
        // 消息文字
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Top, relatedBy: .Equal, toItem: iconView, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 224))
        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
        // 注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Left, relatedBy: .Equal, toItem: messageLabel, attribute: .Left, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
        // 登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Right, relatedBy: .Equal, toItem: messageLabel, attribute: .Right, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        
    // 遮罩
    addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[mask]-0-|", options: [], metrics: nil, views: ["mask": maskIconView]))
    addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[mask]-(btnHeight)-[regButton]", options: [], metrics: ["btnHeight": -36], views: ["mask": maskIconView, "regButton": registerButton]))
        
        backgroundColor = UIColor(white: 237.0 / 255.0, alpha: 1.0)
        
    }

}
